Sphygmomanometer.



C. B. NAGELMAN.

SPHYGMOMANOMETER.

APPLICATION FILED FEB. s. 1912.

Patented Dec. 17, 1918.

attorney provements CLEMENS B. NAGELMAN, OF OARNEYVILLE, WYOMING.

SPHYGMOMANOMETER.

Specification of Letters Patent.

Patented nee. r7, 1918.

Application filed February 6, 1917. Serial No. 146,894.

To all whom it may concern:

Be it known that I, CLEMENS B. NAGEL- MAN, a. citizen of the UnitedStates of America, and resident of Carneyville, in the county ofSheridan and State of WVyoming, have invented certain new and usefulImin Sphygmomanometers, of which the following is a specification.

This invention relates to sphygmomanometers and has for its object theprovision of novel means for increasing or diminishing pressure forcontrolling the circulation of blood in arteries, the said inventionhaving for its further object, the provision of novel means whereby aninstrument of the type mentioned may be produced having safe portabilityas one of its advantages and furthermore, having provision for permitting such portability without necessarily dismantling or dismounting theparts of the apparatus employed.

A further object of this invention is to provide compression deviceswhereby the limb encircling band may be adjusted to increase or diminishthe pressure, the said means being effective to allow a very gradualchange in the tension, thus making it minutely susceptible to pressureof the blood.

A still further object of this invention is to provide means forrendering the instrument of utility in a wide range of pressure, as willpresently appear.

With the foregoing and other objects in view, the invention consists inthe details of construction, and in the arrangement and combination ofparts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, reference will be had to theaccompanying drawings forming part of this specification wherein likecharacters denote corresponding parts in the several views, and in whichFigure 1 illustrates a view in perspective of an apparatus embodying theinvention;

Fig. 2 illustrates a top plan view of the compression member;

Fig. 3 illustrates a perspective view of a fragment of the means forproviding compression; and

Fig. 4- illustrates a perspective View of a fragment of the limbencircling member.

In these drawings 6 denotes a flexible band adapted to encircle the limband having a pocket 7 for containing an air bag 8 which air bag is tobeinflated to a greater or less extent, according to the requirements inpractice. The ends of the flexible band are connected to a buckle orcoupling 9 of such construction, as to afford an adjustment whereby thesaid band can be made to fit different people and in order to increaseor diininish the pressure of the band a flexible strip 9 has its ends 10and 11 secured to the flexible band 6, and a turning key 12 has a slot13 through which the said flexible strip projects, so that when the keyis rotated, the flexible strip is wound or unwound to increase ordiminish the said pressure. The inflatable bag 8 has a coupling 12 witha branch 13, the said branch having a tubular extension 1% through whichair may be blown for inflating the bag, and the air may be retained bythe clamp 15 engaging the said tubular extension.

The coupling 12 is in communication with the rubber tube 16 and therubber tube is controlled by a clamp 17 when desired, as said clamp willpermit the escape of air, but when the apparatus is to be used, theclamp 17 must of course be removed so that the air compressed in the bagwill find its way to the tube to aflect mercury which is held by thetube and influenced by the pressure of the air as the compression memberis manipulated. The tube 16 is U-shaped and its outer end is incommunication with a glass tube 18, the said glass tube and rubber tubebeing supported by the clip 19 and chain 20 which latter is attached tothe buckle or couplin 9. A nipple 21 is attached to the glass tube andit may be closed by the clamp 22. The glass tube has graduations 23 andthe rubber tube has graduations 2%, and the v glass tube may be adjustedso that the graduations thereof have certain relation to those of therubber tube, and preferably the glass tube is graduated from O to 150mm. Very rarely, pressure over 150 has to be registered, but if it isdesired to register pressure between 150 and 250, it can be accomplishedby adjusting the zero mark on the rubber tube opposite the zero mark onthe glass tube. It then, the glass tube is extended farther into therubber tube, the mercury will stand at the zero mark in the glass tube 4exactly opposite the zero mark on the rubber tube, after which the innerend of the rubber tube is lowered, so that its graduation numbered 100is opposite the zero mark on the glass tube and the pressure required toobliterate pulsations is read otf the' glass tube and 100 is added toit. By re'asen of the adj ustabilityof this-deviee,erhereferegiitsutility and range of reading are practically without limit Whereas itsportability and durability will, it is thought, commend itself to usersof these devices and thoseski'lledim the art.

I claim- In a sphyglnomanometer, a limb encircling member, an inflatablebag. secured thereto, a key carried by the limb encircling member fortightening the same, a gradu- .at1l '"tube suspended from thelimbencircling member, a rubber tube c0mmun1cat- 15 CLEMENS NAGELMAN.

Copies of this patent'may be obtainedfor five cents each, by addressingthe Commissioner'oif Yatents, Washington; DJG.

